Changelog for UI 26.8.0

Changes

• Event history display fix (PR, #7730)
• Handle 409 conflict responses in domains, asset/incident types, asset/incident templates (PR, #7563)
• Upgrade Node.js to version 24 (PR, #7701)
• Collapse domains in Overview by default (PR, #7740)
• Fix incident type filtering in dashboard widgets (PR, #7672)
• Aggregate edge counts by type in Graph (PR, #7739)
• Preserve edge from/to asset types for alias matching in graph (PR, #7747)